I acquired a used hi capa in a big lot of stuff I bought from the classifieds. It is a all metal TM clone that was apparently sold as a Zeon or Z Gun a few years ago. It mostly works, but sometimes it doesn't fire when the trigger is pulled and requires either a second trigger pull or jiggling the hammer to get it to fire. It doesn't do it very consistently - sometimes I can fire an entire magazine without the issue and sometimes every shot requires a double pull. It doesn't seem to occur as much for the first ~10 shots after a magazine fill. From looking at videos from KnucklesGSM and LaZouche, it looks like one fix is bending the right finger on the sear spring forward to put more pressure on the disconnector. The spring looked like it had already been bent, but I bent it some more, which seems to have helped somewhat, but the problem still exists. I also tried getting a new WE sear spring, but with that, the gun wouldn't fire at all (hammer stays locked back no matter how many times the trigger is pulled). Comparing the two springs, the right finger is shorter on the WE spring, and contacts the disconnector at the very base. After bending the right side of that spring, it will sometimes fire, but mostly doesn't. I also took the hammer assembly apart, and cleaned and relubed it even though it didn't seem to be dirty without any improvement. Nothing looked terribly worn and the disconnector moves freely, but this is the first hi capa I've taken apart so who knows. Any other suggestions of things to try? Thanks.